Yahoo patents granted on 06 October 2009

6 US patents granted on 06 October 2009 and assigned to Yahoo

1 7,600,046 Event notification
2 7,599,966 System and method for improving online search engine results
3 7,599,950 Systems and methods for collecting user annotations
4 7,599,945 Dynamic cluster visualization
5 7,599,935 Control for enabling a user to preview display of selected content based on another user’s authorization level
6 7,599,911 Method and apparatus for search ranking using human input and automated ranking